A urea tank

Abstract

The utility model belongs to diesel engine technical field discloses a kind of urea tank, including tank and heating assembly, tank side is equipped with suction port;Heating assembly includes heating pipe, heating pipe is set to tank interior, tank is equipped with water inlet and water outlet, heating pipe both ends are connected with water inlet, water outlet respectively, to make heating medium flow in heating pipe, heating pipe and suction port are adjacent arrangement.Such, the heating medium in heating pipe can heat and thaw the urea aqueous solution in tank, to make urea injection system can be stable operation in low temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine technology, and in particular to a urea tank. Background Technology

[0002] A diesel engine is an engine that generates high temperatures by compressing pure air in a cylinder, causing injected diesel fuel to ignite and produce power. It is widely used in heavy trucks, buses, construction machinery, agricultural machinery, and other equipment that requires stable power output.

[0003] The diesel engine is equipped with a urea injection system for treating exhaust gases. The urea injection system includes a urea tank for storing urea solution and a urea pump for delivering the urea solution in the urea tank to the exhaust pipe. The urea tank is connected to a urea sensor to detect the level and concentration of the urea solution in the urea tank.

[0004] However, when the ambient temperature is low, the urea solution in the urea tank will freeze, causing the urea pump to be unable to draw out the urea solution, thus preventing the vehicle's diesel engine urea injection system from operating normally. Utility Model Content

[0005] The purpose of this invention is to provide a urea tank to solve the problem that the urea solution in the tank is prone to freezing in low-temperature environments, which affects the normal operation of the urea injection system.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A urea tank includes: a tank body with a liquid suction port on one side; a heating assembly including a heating tube disposed inside the tank body; an inlet and an outlet on the tank body; the two ends of the heating tube being connected to the inlet and the outlet respectively, so that a heating medium flows inside the heating tube; and the heating tube and the liquid suction port being arranged adjacent to each other.

[0008] Preferably, the liquid suction port is located between the water inlet and the water outlet.

[0009] Preferably, the housing is connected to a filling tube and a sensor, the detection end of the sensor extends into the housing, the housing has a filling port, and the filling tube is connected to the filling port.

[0010] Preferably, the heating tube and the detection end of the sensor are arranged adjacent to each other.

[0011] Preferably, the urea tank includes a first filter screen disposed at the liquid inlet; and / or, the urea tank includes a second filter screen disposed at the filling port.

[0012] Preferably, the heating tube includes a first part and a second part. The first part is disposed at the bottom of the housing and surrounds the detection end of the sensor and the liquid suction port, and the second part extends in a direction close to the filling port.

[0013] Preferably, the heating assembly further includes a first limiting member and a second limiting member, both of which are connected to the heating tube. The first limiting member is disposed adjacent to the liquid suction port to limit the relative position of the heating tube and the liquid suction port. The second limiting member is disposed at the bottom of the housing to limit the relative position of the heating tube and the housing.

[0014] Preferably, the first limiting member is a clamp, which is detachably connected to the heating tube; and / or, the second limiting member is a fixed bracket, which is fixedly disposed at the bottom of the box and detachably connected to the heating tube.

[0015] Preferably, the urea tank includes a first filter screen, which is disposed above the first limiting member.

[0016] Preferably, the first part includes a serpentine segment disposed on both sides of the liquid suction port, and the second limiting member is connected to the serpentine segment.

[0017] The beneficial effects of this utility model are:

[0018] A urea tank includes a tank body and a heating assembly. A liquid suction port is provided on one side of the tank body. The heating assembly includes a heating tube, which is disposed inside the tank body. An inlet and an outlet are provided on the tank body. The two ends of the heating tube are connected to the inlet and the outlet respectively, so that the heating medium flows inside the heating tube. The heating tube and the liquid suction port are arranged adjacent to each other.

[0019] Thus, the heating pipe located inside the chamber is positioned adjacent to the suction port, which allows the urea solution around the suction port to thaw quickly, making it easier for the urea pump to draw out the urea solution through the suction port. This avoids blockage of the suction port due to the urea solution freezing, and enables the urea injection system to operate normally in low-temperature environments. Attached Figure Description

[0020] Figure 1 This is a partial structural schematic diagram of the urea tank in one embodiment of the present invention;

[0021] Figure 2 This is a first cross-sectional view of the urea tank in one embodiment of the present invention;

[0022] Figure 3 This is a second sectional view of the urea tank in one embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the heating tube in one embodiment of the present invention.

[0024] In the picture:

[0025] 1. Housing; 11. Filling pipe; 12. Sensor; 13. Suction port; 14. Water inlet; 15. Water outlet; 16. Exhaust pipe; 2. Heating assembly; 21. Heating tube; 211. First part; 2111. Serpentine section; 2112. Straight section; 212. Second part; 22. Clip; 23. Fixing bracket; 3. First filter screen; 4. Second filter screen. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] See Figures 1 to 4 This utility model provides a urea tank, including a tank body 1 and a heating component 2. The tank body 1 has a liquid suction port 13 on one side. The heating component 2 includes a heating tube 21, which is disposed inside the tank body 1. The tank body 1 has a water inlet 14 and a water outlet 15. The two ends of the heating tube 21 are connected to the water inlet 14 and the water outlet 15 respectively, so that the heating medium flows in the heating tube 21. The heating tube 21 and the liquid suction port 13 are arranged adjacent to each other.

[0031] In this embodiment, the housing 1 is a hollow structure formed by rotational molding. The liquid inlet 13 is located at the bottom of the side wall of the housing 1, and a quick-connect connector (not shown in the figure) is provided at the position of the liquid inlet 13 on the housing 1. The quick-connect connector is connected to a urea pump (not shown in the figure) through a pipe so that the urea aqueous solution in the housing 1 can be transported to the outside of the housing 1 by the urea pump. The heating medium is hot water. Further, the heating medium is engine cooling water. The inlet 14 and the outlet 15 are both provided with connectors made of stainless steel (not shown in the figure), and the connectors are fixedly and sealed to the heating pipe 21 by welding. Hot water can enter the heating pipe 21 through the inlet 14 and heat and thaw the urea aqueous solution in the housing 1. The heating medium after heat exchange with the urea aqueous solution can circulate to the outside of the housing 1 through the outlet 15. Further, the inlet 14 and the outlet 15 are both connected to the engine cooling system.

[0032] Thus, the heating tube 21 is arranged adjacent to the suction port 13, which can heat and thaw the urea solution around the suction port 13, so that the urea pump can draw out the urea solution through the suction port 13, and the urea injection system can operate normally in a low-temperature environment.

[0033] It is understandable that the material of the housing 1 can be HDPE (High Density Polyethylene) or LLDPE (Linear Low-Density Polyethylene), and the heating tube 21 can be made of stainless steel. The materials of the housing 1 and the heating tube 21 can be adjusted according to actual needs, which will not be listed in detail here.

[0034] See Figure 1 and Figure 2 In some embodiments, the suction port 13 is located between the water inlet 14 and the water outlet 15.

[0035] In this embodiment, the inlet 14, the suction port 13, and the outlet 15 are arranged at intervals along the length of the tank 1, and the suction port 13, the inlet 14, and the outlet 15 are all located at the bottom of the side wall of the tank 1.

[0036] In this way, the flow path of the heating medium in the heating tube 21 can be optimized, the urea aqueous solution near the suction port 13 can be heated, the thawing speed and heating uniformity of the area near the suction port 13 can be improved, and the urea pump can be prevented from sucking liquid due to the freezing of the urea aqueous solution near the suction port 13.

[0037] It is understandable that the positions of the inlet 14 and the outlet 15 can be adjusted according to the position of the suction port 13, so as to heat the urea solution near the suction port 13. This will not be elaborated here.

[0038] See Figure 2 In some embodiments, the housing 1 is connected to a filling pipe 11 and a sensor 12. The detection end of the sensor 12 extends into the housing 1, and the housing 1 has a filling port (not shown in the figure). The filling pipe 11 is connected to the filling port. Furthermore, the heating pipe 21 and the detection end of the sensor 12 are arranged adjacent to each other.

[0039] In this embodiment, the filling tube 11 is disposed above the side wall of the box 1 for filling the box 1 with urea aqueous solution. The fixed end of the sensor 12 is fixedly disposed on the top surface of the box 1, and the detection end of the sensor 12 extends vertically and is located inside the box 1.

[0040] In this way, the urea solution can be delivered into the tank 1 through the filling port. The heating tube 21 surrounds the detection end of the sensor 12, which can quickly thaw the urea solution near the detection end of the sensor 12 and prevent the urea solution from freezing and affecting the accuracy of the liquid level and concentration detection of the sensor 12.

[0041] See Figure 3 In some embodiments, the urea tank includes a first filter 3 and a second filter 4, with the first filter 3 located at the suction port 13 and the second filter 4 located at the filling port.

[0042] In this embodiment, the first filter screen 3 is a fan-shaped filter screen, one end of which is installed at the liquid suction port 13 and the other end extends into the interior of the housing 1; the second filter screen 4 is a columnar filter screen, one end of which is installed at the filling port and the other end extends into the interior of the housing 1.

[0043] Thus, the second filter 4 can filter impurities that enter the tank 1 through the filling pipe 11, preventing impurities from accumulating at the bottom of the tank 1. The first filter 3 can filter impurities that enter the urea pump through the suction port 13, preventing the urea pump from becoming clogged, improving the safety of the urea tank, and facilitating the stable operation of the urea injection system in low-temperature environments.

[0044] See Figure 3 and Figure 4In some embodiments, the heating tube 21 includes a first part 211 and a second part 212. The first part 211 is disposed at the bottom of the housing 1 and surrounds the detection end of the sensor 12 and the liquid suction port 13. The second part 212 extends in the direction close to the filling port.

[0045] In this embodiment, the first part 211 and the second part 212 are integrally formed. The shape of the first part 211 is adapted to the shape of the bottom of the box 1. The second part 212 extends vertically from the bottom to the vicinity of the filling port to heat and thaw the urea aqueous solution near the filling port.

[0046] Thus, the first part 211 can heat and thaw the urea solution in the bottom area of ​​the tank 1 over a large area, ensuring that there is a sufficient amount of non-frozen urea solution for the suction port 13 to draw in, thereby ensuring the normal operation of the urea injection system and the normal operation of the engine; at the same time, it can also prevent the urea solution at the bottom of the tank 1 from freezing and clogging the urea pump and affecting the detection accuracy of the sensor 12. The second part 212 can heat the urea solution near the filling port, preventing the urea solution from freezing locally due to low temperature during the filling process, improving the fluidity of the urea solution in the tank 1, and improving the operational stability of the urea injection system in low temperature environments.

[0047] It is understandable that the shape and position of the first part 211 and the second part 212 can be adjusted according to the position of the suction port 13 and the filling tube 11, which will not be elaborated here.

[0048] See Figure 3 In some embodiments, the heating assembly 2 further includes a first limiting member and a second limiting member, both of which are connected to the heating tube 21. The first limiting member is disposed adjacent to the suction port 13 to limit the relative position of the heating tube 21 and the suction port 13. The second limiting member is disposed at the bottom of the housing 1 to limit the relative position of the heating tube 21 and the housing 1. Further, in some embodiments, the first filter screen 3 is disposed above the first limiting member to facilitate sufficient heating of the urea aqueous solution at the suction port 13 by the heating tube 21.

[0049] In this embodiment, the first limiting member is connected to both ends of the heating tube 21 (preferably the water inlet end and the water outlet end of the heating tube 21) to limit the distance between the two ends of the heating tube 21 and control the two ends of the heating tube 21 to be respectively set on both sides of the liquid suction port 13. At least two second limiting members are provided to make the heating tube 21 stably connected to the bottom of the box 1.

[0050] Thus, the first and second limiting components can improve the stability of the heating tube 21 within the housing 1, thereby fixing the heating tube 21 and preventing it from shifting due to factors such as vehicle vibration, which would cause changes in the heating area. This enables continuous heating of the urea solution near the suction port 13 and the filling port, improving the heating and defrosting effect.

[0051] It should be noted that before the box body 1 is rotatably molded, the heating component is placed in the rotatable mold of the box body 1 and then rotatable molded. After the box body 1 is formed, the second limiting component and the connectors at both ends of the heating tube 21 are fixedly connected to the box body 1.

[0052] It is understandable that the number and position of the first and second limiters can be adjusted according to actual needs, and will not be elaborated here.

[0053] See Figure 2 and Figure 3 In some embodiments, the first limiting member is a clip 22, which is detachably connected to the heating tube 21, and the second limiting member is a fixed bracket 23, which is fixedly disposed at the bottom of the box 1 and detachably connected to the heating tube 21.

[0054] In this embodiment, the clamping piece 22 has grooves (not shown in the figure) that are adapted to the shape of the heating tube 21 at the positions corresponding to both ends of the heating tube 21, and is manufactured by stamping. There are two clamping pieces 22, which are respectively set above and below the heating tube 21. The two clamping pieces 22 are detachably connected by bolts. By clamping the two ends of the heating tube 21 with the clamping pieces 22, the relative position of the heating tube 21 and the liquid suction port 13 can be restricted. Both the clamping piece 22 and the fixing bracket 23 are made of stainless steel. The fixing bracket 23 is an "I" shaped frame. The fixing bracket 23 is snapped into the heating tube 21 to limit the position of the heating tube 21.

[0055] Thus, the groove provided on the clamp 22 can achieve the clamping of the clamp 22 and the heating tube 21, improving the stability of the heating tube 21. The fixing bracket 23 can limit the relative position of the heating tube 21 and the box 1, so that the heating tube 21 can heat the urea solution near the suction port 13 and the filling port, avoiding the urea solution from freezing in low temperature environment and affecting the normal operation of the urea injection system.

[0056] It is understood that the first and second limiting components can also be structures such as buckles and snap rings. The specific structures of the first and second limiting components can be adjusted according to actual needs, and will not be listed in detail here. The materials of the clip 22 and the fixing bracket 23 are not limited to stainless steel. In this embodiment, stainless steel is used to make the clip 22 and the fixing bracket 23 have sufficient structural strength and thermal conductivity.

[0057] See Figure 3 and Figure 4 In some embodiments, the first part 211 includes a serpentine segment 2111, which is disposed on both sides of the suction port 13, and the second limiting member is connected to the serpentine segment 2111.

[0058] In this embodiment, the first part 211 further includes a straight section 2112, which is disposed on both sides of the detection end of the sensor 12 and both sides of the suction port 13. The serpentine section 2111 is disposed on both sides of the straight section 2112. Two fixing brackets 23 are provided, and the two fixing brackets 23 are respectively connected to the serpentine section 2111 located on both sides of the straight section 2112.

[0059] Thus, the serpentine segment 2111 extends in a tortuous manner, which can increase the heating contact area, improve the heating uniformity and thawing efficiency of the urea solution in the corresponding area, and prevent the urea solution from freezing. The second limiting member is connected to the serpentine segment 2111, which can improve the connection strength between the heating tube 21 and the bottom of the box 1, and improve the reliability of the urea box in low temperature environment.

[0060] It is understandable that the shape of the first part 211 can be adjusted according to the actual shape of the bottom of the box 1, so as to achieve uniform heating of the urea solution at the bottom of the box 1, which will not be elaborated here.

[0061] See Figure 3 In some embodiments, the filling pipe 11, the suction port 13, the water inlet 14, and the water outlet 15 are all located on the same side of the housing 1.

[0062] In this embodiment, the filling pipe 11, the suction port 13, the water inlet 14 and the water outlet 15 are all located on the side wall of the box 1 along its length.

[0063] In this way, the space of the side wall of the tank 1 can be fully utilized, making the overall structure of the urea tank more compact. It can also increase the concentration of the heating area while avoiding assembly interference between the various structures, so that the urea solution is fully heated, avoiding clogging of the urea pump and affecting the detection of sensor 12, and improving the stability of the urea tank in low-temperature environments.

[0064] See Figure 3 In some embodiments, the housing 1 is also connected to an exhaust pipe 16, which is spaced apart from the filling pipe 11.

[0065] In this embodiment, the exhaust pipe 16 and the filling pipe 11 are spaced apart along the length of the housing 1.

[0066] Thus, when the urea solution enters the tank 1 through the filling pipe 11, the exhaust pipe 16 can discharge the gas inside the tank 1, preventing the gas pressure inside the tank 1 from rising and affecting the injection of the urea solution. The exhaust pipe 16 is located near the filling pipe 11, which makes the urea tank structure more compact and avoids assembly interference with other pipelines.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A urea tank, characterized in that, include: The box body (1) has a liquid suction port (13) on one side; Heating assembly (2), the heating assembly (2) includes a heating tube (21), the heating tube (21) is disposed inside the box (1), the box (1) is provided with a water inlet (14) and a water outlet (15), the two ends of the heating tube (21) are respectively connected to the water inlet (14) and the water outlet (15) so that the heating medium flows in the heating tube (21), the heating tube (21) and the liquid suction port (13) are arranged adjacent to each other.

2. The urea tank according to claim 1, characterized in that, The suction port (13) is located between the water inlet (14) and the water outlet (15).

3. The urea tank according to claim 1, characterized in that, The housing (1) is connected to a filling tube (11) and a sensor (12). The detection end of the sensor (12) extends into the housing (1). The housing (1) has a filling port, and the filling tube (11) is connected to the filling port.

4. The urea tank according to claim 3, characterized in that, The heating tube (21) and the detection end of the sensor (12) are arranged adjacent to each other.

5. The urea tank according to claim 3, characterized in that, The urea tank includes a first filter screen (3) disposed at the liquid inlet (13); and / or, the urea tank includes a second filter screen (4) disposed at the filling port.

6. The urea tank according to claim 3, characterized in that, The heating tube (21) includes a first part (211) and a second part (212). The first part (211) is disposed at the bottom of the housing (1) and surrounds the detection end of the sensor (12) and the liquid suction port (13). The second part (212) extends in the direction close to the filling port.

7. The urea tank according to claim 6, characterized in that, The heating assembly (2) further includes a first limiting member and a second limiting member. Both the first limiting member and the second limiting member are connected to the heating tube (21). The first limiting member and the liquid suction port (13) are arranged adjacent to each other to limit the relative position of the heating tube (21) and the liquid suction port (13). The second limiting member is arranged at the bottom of the box (1) to limit the relative position of the heating tube (21) and the box (1).

8. The urea tank according to claim 7, characterized in that, The first limiting member is a clip (22), which is detachably connected to the heating tube (21); and / or, the second limiting member is a fixed bracket (23), which is fixedly installed at the bottom of the box (1) and detachably connected to the heating tube (21).

9. The urea tank according to claim 7, characterized in that, The urea tank includes a first filter screen (3), which is disposed above the first limiting member.

10. The urea tank according to claim 7, characterized in that, The first part (211) includes a serpentine segment (2111), which is disposed on both sides of the liquid suction port (13), and the second limiting member is connected to the serpentine segment (2111).

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